Design of minimizing embedding impact function in DWT domain and its applications in steganography
小波域最小嵌入失真函数设计及其在隐写中的应用

In order to improve the security of steganography system, an image steganography method based on Minimizing Embedding Impact and Syndrome-Trellis Codes is proposed. First, a distortion function in discrete wavelet transform(DWT) domain was designed according to human visual system and integer lifting wavelet transform, which is mainly concerned about the influences of frequency, luminance, and texture masking factor to the cover distortion. Then, the Syndrome-Trellis Codes are combined with the distortion function to propose the steganography method,to make sure that the embedding impact on the cover minimizing and centralizing is in the un-sensitivity domain. Experiments show that the proposed approach maintains a good visual quality of the stego-image and has a high security against steganalysis in space and wavelet domain. The security capacity can be about 0.4 bits/pixel.